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- [Man] The most important part of any backup strategy…is the ability to restore.…So for that reason I'm going to approach…backup options from the restore needs…of the customer that may appear…in a service level agreement.…To start out let's take a look at why we need a backup.…What is it that we're protecting ourselves from?…One of the most obvious answers is server or site failure.…We want to know that we can recover if a server…or some of its hardware are lost.…

The best solution for this is a database availability group…with multiple copies of the mailbox database.…As discussed in previous chapters…that will provide you with a zero downtime solution…to the loss of a single server.…Another recovery need that's potentially less severe,…but definitely more likely, is accidental deletion.…This scenario is so common that Microsoft…has continued to include a feature…in Exchange Server called Recoverable Items…to allow users to recover their own…accidentally deleted files.…